USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/06 01:54:15.29

Epicenter: -10.479  165.772
MW 7.0

USGS MOMENT TENSOR SOLUTION
Depth  12         No. of sta:  9
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.68       Mtt= 2.78
  Mpp=-2.10       Mrt= 1.04
  Mrp= 0.22       Mtp=-2.95
 Principal axes:
  T  Val=  4.32  Plg=10  Azm= 24
  N       -0.68      74      258
  P       -3.64      13      117

Best Double Couple:Mo=4.0*10**19
 NP1:Strike=251 Dip=88 Slip=-164
 NP2:       160     74        -2

Moment Tensor Solution
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away from the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.

Moment Tensor Solution